Quarter	Billions of US Dollars
1987-01-01	0.05000
1989-10-01	-0.03000
1991-01-01	0.03510
1993-10-01	0.22500
1995-07-01	0.04000
1995-10-01	0.02971
1996-01-01	-0.00242
1996-04-01	0.35862
1996-07-01	0.37265
1996-10-01	1.06215
1997-01-01	0.29299
1997-04-01	0.56571
1997-07-01	0.12241
1997-10-01	-0.06944
1998-01-01	-0.13034
1998-04-01	1.78426
1998-07-01	-0.00279
1999-01-01	0.89697
1999-04-01	-0.45810
1999-07-01	0.39239
1999-10-01	-0.21625
2000-01-01	0.42219
2000-04-01	0.50605
2000-07-01	-0.03235
2000-10-01	0.37687
2001-01-01	1.73130
2001-04-01	-0.00822
2001-07-01	0.03939
2001-10-01	-0.66844
2002-01-01	-0.04958
2002-04-01	-1.49237
2002-07-01	0.03560
2002-10-01	0.07807
2003-01-01	0.03746
2003-04-01	0.10174
2003-07-01	0.18225
2003-10-01	0.52048
2004-01-01	0.67380
2004-04-01	0.70280
2004-07-01	0.42454
2004-10-01	0.90749
2005-01-01	0.43519
2005-04-01	0.51267
2005-07-01	1.97482
2005-10-01	1.18038
2006-01-01	0.37341
2006-04-01	0.32375
2006-07-01	1.13731
2006-10-01	-0.11112
2007-01-01	-0.22570
2007-04-01	0.48121
2007-07-01	0.42131
2007-10-01	-0.40077
2008-01-01	-0.17587
2008-04-01	0.66721
2008-07-01	1.34841
2008-10-01	-0.15560
2009-01-01	-1.26341
2009-04-01	-1.39191
2009-07-01	0.88250
2009-10-01	2.03588
2010-01-01	0.35230
2010-04-01	-1.19097
2010-07-01	1.37701
2010-10-01	-0.80415
2011-01-01	0.73073
2011-04-01	2.03575
2011-07-01	-0.28357
2011-10-01	1.21635
2012-01-01	0.91819
2012-04-01	0.69904
2012-07-01	3.16049
2012-10-01	2.74230
2013-01-01	0.72716
2013-04-01	0.14137
2013-07-01	0.19984
2013-10-01	-0.54515
2014-01-01	0.80143
2014-04-01	0.56988
2014-07-01	1.39704
2014-10-01	-1.63980
2015-01-01	1.02480
2015-04-01	0.38219